Which island group is considered coral in origin?

Correct answer: Lakshadweep

The direct answer is A: Lakshadweep is considered a group of coral islands. Coral islands develop mainly from the skeletons of tiny marine organisms called corals. In warm, shallow tropical seas, coral growth can build reefs, atolls and small islands. Lakshadweep in the Arabian Sea is famous for its coral origin and atoll-like formations. The reasoning is: the question asks for a coral-origin island group; recall India’s standard school-geography example; choose Lakshadweep. Option A is correct because Lakshadweep is identified as a coral island group. Option B is wrong because the Andaman Islands are mainly associated with tectonic and volcanic island formation, not the standard coral-group answer in this question. Option C is wrong for the same reason: Nicobar belongs to the Andaman–Nicobar island system and is not the expected answer for a coral-origin group. Option D is wrong because Majuli is a river island in the Brahmaputra, formed by river deposition, not a sea coral island group. The memory cue is: “Lakshadweep—lagoon and coral; Andaman–Nicobar—larger tectonic island system; Majuli—river island.”